Table 1.

Datasets comparison.

Dataset	Image classification	Image size	Format
DRIVE	Total 40 images	565 × 584	JPEG
	20 test, 20 training
	7 abnormal, 33 normal
STARE	Total 20 images	700 × 605	PPM
	10 normal
	10 abnormal
HRF	Total 45 images	3504 × 2336	JPEG
	15 normal, 15 DR
	15 glaucomatous
CHASE_DBI	Total 28 images	1280 × 960	JPEG
	14 left eye
	14 right eye